Type-bar and bearing therefor.



A. W. GHAMBERLIN. TYPE BAR AND BEARING THEREFOR APPLIOATION FILEDAUG,10,1908.

Patented Feb. 23, 1909.

bearing usting cums TYPIJ-LBAIL AND BEARING THEREFOR.

Specification of Letters Patent.

Patented Feb. :23, 1909.

Application i'ilczl August 10, 1903. Serial No. @1763.

To all whom it 11mg conctrn:

Be it known that I, Ann-Ion \VEBBER \HAAHHLRLIN. u citizen of the UnitedStates.

and a resident of New York city, borough of Brooklyn, county of Kings,and State of New York, have invented certain new and useful Improvementsin 'Iype-Bars and Bearings Thcrci'or, of which the following IS aspecification; v

My invention relates to hearings for type bars or similar zlcvicesrequiring accurate alinenienh and the principal object is to produce adevice of thin class, in which the is adapted to be automaticallytightened by niovcinentof the type bar whenever it works loose.

'l'benizture of the invention will be more fully understood from a.detailed description thereof in coniurction with Ihc accompanyin;drawing in which- Figure 1 is end elevation banger; l 'ig.

of the type bar, bearing and 3 is a detail view 01 the adfor tighteningthe bearing; Figs l and are respectively edge View and face view of oneof the adjusting face cams and the cone hearing ussocinicd thcrcwitl'i.

The type hm. l is pivoted on adjustable cone bearing 2 which is mountedupon the grooved, wire 3, and S8ClI1(l"fl0l11 rotation with respectthereto by a key or projection The wire 3 is, in torn, supported by thehangers 5. 6.' The type bar 1 may he of any known or desiredconstrucliom and is prefera'bly formed from sheet steel.

thickness of the washers 7,

The hungers 5, (3, may form part of a slotted steel segment carrying allof the hearinggof the typewriter. As suggcted by the showing in Fig. 9,the slotted wire 3 may be continuous and extend through. and form thesupport for adjacent, bearings of the vurious type bars. The bearingsurfuce of the type bar is held in engagement with the cone 2 by thecooperating washer 7, while the cone itself is held in position by awzishe. 8.

in. order to udjust the position of the cone 2 with respect to the typebar and the washer Zfwhen it is desired to tighten the bearing toprevent play 01 the type bar, the Washer o side elevation and Fig. 2 ani l l l i l i I l Min-ch :iom, 1908. In my prc:-cnt

S is provided on its rear side with a beveled Surface 9, engaging acorresponding beveled portion of the hunger 6. the slot. between hangers5 and 6 and the are so the position shown any rotary inoven'imt of 8 andof type bur proportioned that with the pa ts in The width of l i l l l ll I l l l l i the cum washer b' will cuusc the cum surfaces therebytightening" up the hcuring.

Any known or dodrcd nun-ins may be cinployrd lor ndjmling the cum 9..lrcl'crubly, howci'rr, lhc mcznn la :nnonnil ic, lhc lightcnint: actionbeing brought into operation when nrcdcd to tho cxlcnt m-cdcd.lrcl'orwbly, lightening morrnu-nl i cil'rclcd by mo men: of the typelml' us the t 'pr-n'rncr is opcrutcd. :ind prclcrubly lhc mowmrnt ol'the type hair in (uuwdlp lukc clljcct upon the ll' ls by mc dhplznrnxcnlol' the type bur whiclrrcnults: from loohcncw of the curing. Theparticular dire tion of displuccmrnt of the-typo bur which is caused byiluloos'cnvsw of [he lit-airing, may be it hitcrul dhplucemcnt, such asct forth in my prior application, blcriul No. 424,211, lilcd upplicmLion, howcycr, the tightening relation results principally from theradially ccccntric position which the type bur assumes when the concbearing is loose: The means employed in the present case consists of ascgmcl'itul rircnlur bearing face 11 rigid with the type bar andpreferably formcd by the intcgral extension 12. The circular segment 11is preferably exactly concentric with the hearing; fare of the type bur.From such :1 cont-rn -tion, it results that ii the cone bcuring loosens,the segment ll. will no longer be mnccnlric with the axis 3 but beingpulled dmvnwurdlr by the operating link 11 when the operating kcy idcprcsscd, the segment become alig'llll) ccccnlric with respect lo 25.his ci-ccntric'ily ol the scgim-nl ll is lit ilizcd to rolnlc theadjusting rum H through the inslrlnncnlnlitv ol rudiul arm 14-projecting lhcrcfroni and carrying on :intifriclion roller 1.? hcurmgupon said ncgn'icnl 11. When the bun-inn is tight, the segment 11 is ator near contort with tho roller 15. but as soon us the hearing loosens.lhc pull of the link 13 sci-Yes to bring the segment 11 into moreopcrutive engagement with the roller 1.3, thereby 21ppl \"in nllicicntpowcr to rotate the cum 8 u slight distance. The proportion ol' parts isnmde ouch that the power applied through thc segment 11. roller 15. andarm 14 will be sniliciont to rotate the cum 8 thc distance required totighten the born-inn. and thrrcby correct the m'ccntricity o'l'snr'iI-u-c l] by bringing the bearing surt'ncc ot' thc type bar bearingbnrk into full engagement with cone thereby rcidoring sn-rfnrc ll tonormal position of the osition concentric with axis 3. Having reachedthe concentric position, the segment 11 no longer hears forcibly on 15and the bearing remains; in its adjusted position un til further wearcauses sufficient ioosencss and eccentricity to again bring the segment11 into contact with the roller 1-5 and thereby again tighten the coneIn t1oe ,-the takes place in distinct, noticeable steps, is rather 2continuing tendency operating at all times to prevent any noticeableloosening of the hearing.

It will be noted that the power stroke wherein the key pulls type tendsto cause more intent of surface '11 with roller 15 than does the reversemovement. Hence, the tightening is normally progressive in one directionlong as the wear of the hearing continues.

"g movement of the cam in either'direction, or

operate to tighten up the hearing and an authereby.

tomatic tightening means operating by the reverse movement of the typebar could he used, if desired.

While-the cam action of the washer 8 through surfaces 9, 10, as abovedescribed, is I for the purpose, E to provide the washer in many casessnficient prefer in certain cases 7 with a cam engagement with hanger 5,which enga ement is preferably similar and symmetrica 10.--- In suchcase, rotary adiusti 8 by means of a finger ith' face cams such asshown, any rotary 1 1} ii E tiona y greate actual pracad ustment abovedescribed seldgm i at radial distance of ,of the hearing should herelink '13 to elevate the 1 forcibic engegeto the cam mgagementat 9 andthe washer 7 is given n j ng movement with the washer or projection 16,pre{- 1 crably formed integrally with 8 and extendf ing across intoengagement with the recess 17 in cam washer 7. rangled at a suflicientso t at the hub portion not engage therewith.

fer the symmetrical arrangement, where the of the type bar does Thefinger 16 is arradial distance from 3,

In most cases 1 prewashers 7 and 8 are both cams, heceuse the doubleadjustment of the two cams 1n onpof vidai. w th an mciined hearing sitedirections serves to maintain the lateral type bar,

whereas if one cam 2 rasher 8 only is used, to take up all of the 5fully sh yi'ilme depointed out in the api becomes more eccentric nendedclaims certain novel features of conand operation which struction,arrangement, characterize my invention, it will be under- 2 stood bythose skilled in the art that various omissions, substitutions,- forms,proportions,

and changes in the sizes, -and details or the device and of itsoperation, may he made without departing from vention.

the spirit ofi my 111- n will he understood that I on. not attempted toshow accurately the exact pitch oieoee desirnhle for the co 8, 9, or ofcone 2, err- -2 the invention thee-e will. be selected so as-to insureetficient iiccordzince with the prin down. 1 Simii'eriy. gaging surfaceEl, arm i4, and r0,

varied port cniariy as to radius, and circnmfei'cntiei e7: surfncell.Indeterminin and ing the precise dimen available power transsurirzce androller lo. x.- overcorne toe friction at [bearing surfaces, to t tightenthe hearing. roicr, such as 15, act-no. lg; transmit the radius of hesurfaces and he;

The expression ing surfaces as need. cover any hearing ranged to take no"Went 1 I gituclinally of the axis of com for efiecting the 2 hearing totake up wear. has the characteristic ieetnre wedging action of an iprodnce relative movem in 115 new, the term so! e wherein the $7 spiralor a heiin.

1 claim:

o orticm onrtegi tin 1. A. type her and a. hearing therefor, providedwith an inclined or coned been:

surface, in combination w:

tightening said hearing th .Ineans "for by eccentricity of the type herwhen the btffi'illkg is ioose, enhstantiziily as descrihed.

2. A type her and a hearing therefor, pro- ..orface.

for moving the of the shaft to id hearing, said means being acto es thetype bar combination with means bearing along the axis tighten so. etedmore forcibly according b' rcaso ness of the hearing, so scribed.

3. A type oar and a vided with an inclined or coned bee e earn zinc.

ng by eccensurface, in combination means for tightening saio he trinityof the type bar when he i=3 loose, substantially as descr;

it. A type bar and a hear vided with an inclined. hen combination with acare for hearing along the axis or the 5% acid "nearing, ar whereactuated more ic-rcihiy according n of loosestontially as dehenringtherefor. proring bar becomes more eccentric by reason'of the loosenessof the bearing, substantially as described.

A type bar and a bearing; therefor, provided with ai'i'iiiclii'ied 'orconed bearing surface, in combination with a face cam for tighteningsaid bearing said cam, being actuated by eccentricity of the type barwhen the bearing is loose, substantially as described.

6. A type bar and a bearing therefor, provided with an inclined bearingsurface, in combination with a face cam for moving the bearing along theaxis of the shaft'to tighten said bearing, and means whereby said facecam is actuated more forcibly according as thetype bar becoi'nes moreeccentric by i'ca solt of the looscness of the bearing. substantially asdescribed.

7. A type bar and a bearing; therefor, provided with an inclined bearingsurface, in combination with a pair of cams for moving the bearing alongthe axis of the shaft to tighten said bearing. and means whereby saidcams are actuated more forciblyaccording as the type bar becomes moreeccentric by reason of the looseiiess of the bearingja snlistantially asdescribed' 8. A type bar and a bearing therefor, provided with aninclined or coned bearing surface, in combination with a pair of camsfor tightening said bearing said cams beingactnatecl by eccentricity ofthe typebar when the bearing is loose, substantially as described.

9. A ty ie bar and a bearing therefor, provided with an inclined orconcd bearing'snu and means whereby said cams are actuated byeccentricity of the type bar when he beariii r is loose, substantiallyas described.

12. I type bar anda beariiigrtherefor, provided with an inclined bearingsurface, in combination with a pair of caiiissynilmctrically tll'ltllltd one on cihtli side dfthe said type bar for lllOVlIlQ the bearingalong the axis of the shaft tp tighten said bearing, and means wherebysaid caiiisare actuated more forcibly according as the type bar becomesmore eccentric by reason of the loose ness of the bearing. substantiallyas described. 1

155, A typebai' and a bearingtlierefor, said type bar being formed witha circular segment concentric with the bairiiig surface thereof, in(fOlllbllllllOlL with coiiperating 'n'ieans for -ti,g'htciiiii; saidbearing, said tightening means including a member maintained at a fixeddistance from the axis of said bearing and adapted to be engaged by saidcircular segment when the latter, be-

comes eccentric to the axis by reason of loosciiess of the bearing. i

H. A type bar. a bearing therefor, and means for tightening saidbearing," in combiiiatioi with means for (lptltltlllg'llle tight cuingincrhanisiii from the type bar movement, said means being bronght iiitooperative rclatihn by radial or eccentric displacement of thc type bar;i

. 15. i\ type bar, bearing surface therefor,

and cam surfaces for tightening said bearface, in combination with apair of face canis for, tightening said bearing and means 1ceiit,i'-ic1ty'of the type bar when the beariii is loose, substantiallyas described.

10. A type bar and a lKtllHlfjj therefor, proyided with an inclinedbearing:v surface, in

combination with a pair moving the bearing along the axis of the shaftto tighten said bearing, and means whereby said pair of face cams isactuated more forcibly accordiinz as the type bar be comes ti'lOi'teccentric by reason of the lOl-FC mas, in combination with frictionaldriving lllt'tlllh for rot at int, said cam by rotary movemciit of thetype bar, the effective radii and areas of the bearing and cam surfacesbeing I smaller than the effective radii and areas of whereby said camsmay o :HlJHSlttl by ccconed bearing snrone on each side of i the drivingand frictional rotating means,

in such proportion and to suchfextent that" thc driring effect of thepower transmitted through the frictional rriving surface is greater thantheopposing effect of the fricof face cams foe

